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Free calculator widgets for your website

Running an Australian money blog, a real estate or mortgage broker site, a hardware or landscape supply business or a motoring site? Put any of our calculators on your own page so your readers get exact answers without leaving. It is free, it has no ads inside, and it works on phones.

How to add a calculator

Pick a calculator below and click Copy code.
Paste the code into your page. In WordPress, use a Custom HTML block. In Squarespace, Wix or Webflow, use an Embed or Code block.
Publish. The calculator adjusts its height automatically. If your site strips scripts, it still works at a fixed height.

The only thing we ask is that you keep the small credit line under the calculator. The math always runs in your reader's browser and nothing they type is sent anywhere. Want a calculator we do not have, or a different color? Tell us.

Pay Calculator: Salary After Tax (2026-27)

Take home pay after income tax, the low income tax offset and the Medicare levy, per year, month, fortnight and week. See it live.

<iframe src="https://au.homemathcalc.com/embed/take-home-pay-calculator/" title="Pay Calculator: Salary After Tax (2026-27)" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Pay Calculator: Salary After Tax (2026-27) by <a href="https://au.homemathcalc.com/take-home-pay-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Income Tax Calculator (2026-27)

Tax on your taxable income at the 2026-27 ATO rates, with the low income tax offset, Medicare levy and your marginal rate. See it live.

<iframe src="https://au.homemathcalc.com/embed/income-tax-calculator/" title="Income Tax Calculator (2026-27)" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Income Tax Calculator (2026-27) by <a href="https://au.homemathcalc.com/income-tax-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Stamp Duty Calculator (all states)

Transfer duty for every state and territory, with home and first home buyer concessions. See it live.

<iframe src="https://au.homemathcalc.com/embed/stamp-duty-calculator/" title="Stamp Duty Calculator (all states)" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Stamp Duty Calculator (all states) by <a href="https://au.homemathcalc.com/stamp-duty-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

GST Calculator (Australia)

Add 10% GST to a price or work out the GST inside a GST-inclusive price. See it live.

<iframe src="https://au.homemathcalc.com/embed/gst-calculator/" title="GST Calculator (Australia)" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">GST Calculator (Australia) by <a href="https://au.homemathcalc.com/gst-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Mortgage Repayment Calculator

Home loan repayments monthly, fortnightly or weekly, total interest and the effect of extra repayments. See it live.

<iframe src="https://au.homemathcalc.com/embed/mortgage-repayment-calculator/" title="Mortgage Repayment Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Mortgage Repayment Calculator by <a href="https://au.homemathcalc.com/mortgage-repayment-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Car Loan and Personal Loan Calculator

Monthly, fortnightly or weekly repayments and total interest for a car or personal loan, with an optional balloon. See it live.

<iframe src="https://au.homemathcalc.com/embed/loan-calculator/" title="Car Loan and Personal Loan Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Car Loan and Personal Loan Calculator by <a href="https://au.homemathcalc.com/loan-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Compound Interest and Savings Calculator

How savings grow with compound interest and regular monthly deposits. See it live.

<iframe src="https://au.homemathcalc.com/embed/compound-interest-calculator/" title="Compound Interest and Savings Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Compound Interest and Savings Calculator by <a href="https://au.homemathcalc.com/compound-interest-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Salary to Hourly Rate Calculator

Convert an annual salary to monthly, weekly, daily and hourly pay, or the other way round. See it live.

<iframe src="https://au.homemathcalc.com/embed/salary-to-hourly-calculator/" title="Salary to Hourly Rate Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Salary to Hourly Rate Calculator by <a href="https://au.homemathcalc.com/salary-to-hourly-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Percentage Calculator

Percent of a number, percentage change, and adding or taking off a percentage. See it live.

<iframe src="https://au.homemathcalc.com/embed/percentage-calculator/" title="Percentage Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Percentage Calculator by <a href="https://au.homemathcalc.com/percentage-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Pool Volume Calculator (litres)

Litres of water in a rectangular, round or oval pool, and the salt needed for a salt chlorinator. See it live.

<iframe src="https://au.homemathcalc.com/embed/pool-volume-calculator/" title="Pool Volume Calculator (litres)" width="100%" height="780" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Pool Volume Calculator (litres) by <a href="https://au.homemathcalc.com/pool-volume-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Square Metre Calculator

Area of rooms and spaces in square metres and square feet, with waste and cost. See it live.

<iframe src="https://au.homemathcalc.com/embed/square-metre-calculator/" title="Square Metre Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Square Metre Calculator by <a href="https://au.homemathcalc.com/square-metre-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Concrete Calculator (m³ and bags)

Cubic metres, tonnes and 20 kg bags for slabs, footings and post holes. See it live.

<iframe src="https://au.homemathcalc.com/embed/concrete-calculator/" title="Concrete Calculator (m³ and bags)" width="100%" height="850" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Concrete Calculator (m³ and bags) by <a href="https://au.homemathcalc.com/concrete-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Paint Calculator (litres)

Litres and cans of interior paint for walls and ceilings, minus doors and windows. See it live.

<iframe src="https://au.homemathcalc.com/embed/paint-calculator/" title="Paint Calculator (litres)" width="100%" height="820" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Paint Calculator (litres) by <a href="https://au.homemathcalc.com/paint-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Tile Calculator (m² and boxes)

Number of tiles and boxes for a floor or wall from its size in metres and the tile size in mm. See it live.

<iframe src="https://au.homemathcalc.com/embed/tile-calculator/" title="Tile Calculator (m² and boxes)" width="100%" height="830" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Tile Calculator (m² and boxes) by <a href="https://au.homemathcalc.com/tile-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Decking Calculator

Deck boards, joists and screws for a deck measured in metres. See it live.

<iframe src="https://au.homemathcalc.com/embed/decking-calculator/" title="Decking Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Decking Calculator by <a href="https://au.homemathcalc.com/decking-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Gravel and Road Base Calculator

Tonnes and cubic metres of gravel, pebbles or road base for a driveway, path or base. See it live.

<iframe src="https://au.homemathcalc.com/embed/gravel-calculator/" title="Gravel and Road Base Calculator" width="100%" height="850" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Gravel and Road Base Calculator by <a href="https://au.homemathcalc.com/gravel-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Solar Panel Savings Calculator (Australia)

Yearly solar output, bill savings, feed-in credits and payback for a home system in Australia. See it live.

<iframe src="https://au.homemathcalc.com/embed/solar-panel-calculator/" title="Solar Panel Savings Calculator (Australia)" width="100%" height="910" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Solar Panel Savings Calculator (Australia) by <a href="https://au.homemathcalc.com/solar-panel-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Electricity Cost Calculator (Australia)

Running cost of any appliance per hour, day, month and year at your cents per kWh. See it live.

<iframe src="https://au.homemathcalc.com/embed/electricity-cost-calculator/" title="Electricity Cost Calculator (Australia)" width="100%" height="790" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Electricity Cost Calculator (Australia) by <a href="https://au.homemathcalc.com/electricity-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Fuel Cost Calculator (L/100km)

Litres and cost of fuel for a trip from the distance, L/100km and the price per litre. See it live.

<iframe src="https://au.homemathcalc.com/embed/fuel-cost-calculator/" title="Fuel Cost Calculator (L/100km)" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Fuel Cost Calculator (L/100km) by <a href="https://au.homemathcalc.com/fuel-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://au.homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>